My original use of header tanks goes back several years on glow motors, and the reason was to correct a tail heavy position...

Now, running lighter ZDZ engines, I'm finding the same situation....rather than lead, why not GAS ? Makes perfectly good sense to me, and I'll likely do it on my next project coming up.

I need about 8 oz to balance things....so....I figure a 8 or 10 oz header tank, then a much smaller tank amidships.

Great ideas!!